Pump



.July 28, 1936. VW 1 GE; 2,049,391

PUMPA Filed Feb. 4, 1956 5 Sheets-Sheet l W. J. GEE

July 28, 1936.

PUMP

Filed Feb. 4, 1936 5 Sheets-Sheet 4 W. J. GEE

'.Iuly 28, 1936.

PUMP

Filed Feb. 4, 1936 5 Sheets-Sheet 5 ATTORNEY Patented July 28, 15936PATENT OFFICE PUMP William John Gee, London, England, assignor to TheGee Pump Company Limited, London,

England VApplication February 4, 1936, Serial No. 62,317

In Great Britain April 28, 1934 6 anims. (c1. 10s- 156) I have ledapplications in Great Britain on the 28th April, 1934; 27th June, 1934and 25th October, 1934.

The present invention relates to improvements 5 -in pumps having anumber of pistons working in parallel. One of the objects of theinvention is to provide pumps of large capacity and comparatively smallsize, suitable for use, for instance, as oilpumps or deep well pumps. At

lpresent, deep well pumps usually have a very long stroke and a verysmall number of strokes per unit of time, and they are very bulky.

Y This object of increasing the capacity and reducing the size of thepump is, according to the l-linvention, attained by providing a pumpwith a number, preferably a considerable number of pump compartments andcorresponding working pistons, which work synchronously with a shortstroke less than the diameter of the piston. The

20'- individual pump compartments work in parallel so that the rate fdelivery of the pump equals l the sum of the rates of delivery of theindividual compartments.` For the same number of strokes perV minute thecapacity of the pump will there- 25' forebe equal to that of an ordinarysingle piston pump of about the same size having a much longer stroke,whilst with an increased number of strokes per minute, which is renderedpossible by the reduced length of the stroke, the delivery 30l of thepump may be made higher than that of an ordinary single piston longstroke pump of about the same size.

According to one construction, the improved pump comprises a relativelylong working cylin- 35 derdivided axially into a number of compartments.A central rod operated by any suitable means, for instance, by aneccentric crank or the like acting upon one end of the rod, is fittedwithin each compartment of the working cylinder 4-0l with a collaradapted to operate as a piston, there being therefore one collar orpiston for each compartment into which` the cylinder is divided.

l A preferred construction, particularly suitable 45 for mines, whichfacilitates assembly ofthe parts,

is thev following:-

A pump cylinder consists of one long cylinder in which the compartmentsare formed by discs separated and held at the required distance by`cylinder liners, the vwhole being secured by a screwed cap at one endor by screwed members at both ends. The pistons working in thecornpartments are formed of plates mounted upon a common piston rod andseparated by distance pieces or tubes, the wholeA being locked inposition by one `or more screwed ends. 'Ihe pump cylinder and theassociated valve chambers and valves are mounted in a common tube oflarge diameter in such a manner that a suction conduit and a deliveryconduit are formed in the 5 tube on opposite sides oi the pump cylinder,and alongside thereof. The arrangement may also be such that the pumpcylinder is mounted in the centre of atube of largediameter but in sucha manner that two conduits formed in the tube on ,opposite sides of thepump and alongside thereof are each used both as a suction and adelivery conduit. The latter arrangement is particularly suitable forsubmerged mine pumps. Each compartment may have two ports in the side,one at each end of the compartment, These portsV may be controlled bypositively operated valves, and the valves may be slide valves, and actalternately as suction and delivery valves. The valve may receive areciprocatory movement, for instance, in the axial Ymovement of the pumpor an oscillatory or rotary movement about an axis parallel to the axisof thepump. When using positively operated valves it is possible tooperate all or say one half of the valves simultaneously andsynchronously by a common operating member. Instead of using positivelyoperated valves, automatic suction and delivery valves may be used andin that case the common cylinder may again be arranged in the centre ofa common tube of large diameter, and conduits formed in the tube onopposite sides of the pump and alongside therewith may each be usedalternately as a suction and delivery conduit. Such a construction isparticularly suitable for deep well pumps, lthe liquid owing thensubstantiallyin an axial direction through the common tube.

' In all cases the pump may be made double acting in all thecompartments by suitable arrange- 40 ments of the ports and the valves.

In order to reduce vibration and hammer which are liable to occur athigh speeds, resilient means are interposed according to the inventionbetween the pistons working in the individual compartments and theirdrive so as to obtain a cushioning effect at each end of the stroke. Forinstance, the pistons are not rigidly mounted on the common rod, but arecapable of a limited axial sliding movement thereon, and suitable springwashers are interposed between the pistons and the tubular distancepieces.

The invention also provides an improved and simplied gear for operatinga number of pistons and associated valves from a common rotating shaft.According to the invention, a piston rod carrying a number of pistons isoperated from the strap of an eccentric mounted upon the rotating shaft,whilst two sets of valves associated with the pistons, are operated by arocking lever and interposed links, the rocking lever receiving itsoscillating movement from the strap of the eccentric.

According to one construction of the operating gear, an eccentricmounted upon ahorizontal shaft is provided with a strap having adepending exten,-

sion or arm to which is pivoted the connection rod of the pistons. Uponthe same shaft is loosely mounted a three-armed rocking lever. In themiddle position of the rocking lever, one arm is in the verticalposition and the other tWo arms` are in the horizontal position,theeccentric being then either in the top or the bottom dead centre. Oneof the horizontal arms is connected by a pair of links with one set ofValves and the other horizontal arm is connected -by-a pairvo'f linkswith another set of valves, the two sets of valves being arrangedydiametrically opposite with regardA to the common cylinder of the pump.`The vertical Varm is connected by a transverse member with a rodextending vertically from the top o f the strap. During rotation of theshaft `the eccentricoperates by means of the strap all the pistons, andthe oscillation ofthe strap is transmitted by the upwardly extending rodto the rock-- ing lever, whereby the two sets of valves are operated. Inall the preferred constructions the pistons do not contain any valvesand all the valves are arranged outside the compartments. The improvedgear has the advantage of great Fig. 1 is a sectional elevation on lineI-I ofv Fig. 2 of "a pump having positively'operated slide valves.

Fig. 2 is a section on line'II-II of Fig.'1; Fig. 3 is a cross sectionon line III- III of Fig. 1. Fig. 4 is atop view of Fig. 1. Fig. 5 is 'alpartial'cross section on line `V-V of Fig. 1. Fig.6 `is'a sectionalelevation of a modified construction in'which spring `washers areinterposedv between' the pistons and their drive. 2 Fig. 7 is a sectionon line VII-VII of Fig. v6.

, Fig. V8 shows in 'sectional'elevation' a pump suit--l of a'cover 6 xedby means of boltsr'. lar casing I is divided by a transverse pump bodytubularV outer casingclosed at the lower endl by a base plate 5'1ixed tothe casing I by bolts 8, and having a suction conduit 2 and a deliveryconduitV 3. The casing is closed at the top by means 'I'he tubu- 4 intotwo separate chambers Illjand I-I, the chamber I0 co-mmunicatingwith thesuction 2 and the chamber II communicating with the delivery3. The pumpvbody "Il hasV a 'cylindrical bore I2 in which four ypump compartmentsI3, I4, I5 and I6 are formed by end discs I 1, I8, I9 and 20 which areheld at the required distance by cylindrical liners 9, 9, 9, 9 of thepump body l. In the compartments I3, I, I5 and i6 work four pistons` 2lmounted upon av common piston rod 22 and held upon said rod at therequired distance Vby tubular distance pieces or sleeves 23.l Eachcompart-V a rod 26 guided vertically in a gland 29 of the cover 6. Thesuction ports 24, 25 are controlled by. a common plate-shaped member 3verticallyv guided upon the face of the pump body Il in guiden ways 3l,3l Xed to the face of the pump body, said plate member 3S having ports32 adapted to register with the section ports 24 and 25. In the middleposition of the plate `3Elthe ports A32 register with the discsII, I3,I9, 20 and whenl moved from this middle position in ithe :one or theother direction, open adjacent suction por-ts.` The delivery ports 26,2.7 are controlled by a sim--` ilar plate r33 guided in Ways 3@ andprovided with. discharge openings 35. Y f

v*The pistons 2l and the-valve plates 3U andi A33 are operated from acommon shaft 3G mounted in ball bearings Si, 38 carried byuprights39,110; fixed upon the cover 6 -by-Vbolts Upon the shaftV 36 are iixedlymounted `two identical eccentrica fil, di having a common strap 42whichvis pivotally connected by a bolt' 43 with the upper end of ftherod 23; Between theecc'entrics loosely mountedupon the shaft 35 athree-armedV lever de, 45, 45. The middle arm Ill of this lever.

' is slidabie in a lvertical borefi of a `cylindrical 52 being!connected with -plate 33. Upon 'roltation of the shaft A35 the rod 28 isreciprocating vertically by theieccentrics il and drives the fourpistons 2i. At Vthe same time, the Iplatevalves 3E! and B3 are operatedin opposite directions by the three-armed lever 45, 35, d5 whichAreceives its movement from the-eccentricstrap armf48,v48-` through across member ill and Adrives `the valves by means of links IIB. iia'ndrods 5I, 52;

VIt Vwill be seen that by this mechanismV the valves receive -a veryquick opening and closing,

movement.

-The construction of the pump is very simple and thepar'ts canbe-easilyr assembled. Tlieccn'- struction is extremely compact'particularly ifv compared with the usual `well pumps having a'singlepiston and a'comparativelydong stroke. f

Y Inorder -to reduce vibration and vhammer which may occur at highspeeds., resilient means maybe` interposed betweenthe pistons working inthe individualcompartments and their drive vsofas to obtain a cushioningeffect at e'ach-'endof the stroke. A construction serving this purpose--is shown in Figs. 6 and '7. In these figures 22 in'di cates a commonpiston rod, -2I, 2l are -pistons workingfincompartments I4, I5; Vlil and20 arey end discs, and 273, 23, 23 are tubulardistance membersholdingthe pistons 2-I apart. "Betw'een the tubulardistancemern'bers'vZS and thepistons 2 I are jinterposed spring'lwashersv-56 through whichthedrive is transmitted d Y .Figs. 8, 9 and 10illustrate a construction according to the invention in which automaticsuction and Vdelivery valves are used. In this construction a tubularouter casing 60 is integral with a pump body 6| having a cylindricalbore, the annular space between the casing 60 and the pump body 6| beingclosed at the lower end by an integral plate 62 and being closed at thetop by an integral plate 63, and is divided by two longitudinal ribs 64,64 into two chambers 65, 66. Each of these chambers alternately acts asa suction and a delivery conduit. The pump body 6| is closed at the` topby a screwed-in cover 61 and at the bottom by a screwed-in cover 68. Inthe plate 62 are mounted automatic suction valves 80, ve such valvesbeing provided on either side. The lift of the valve isv limited bystops 10 screwed into the outer casing. A perforated basket 1| is fixedby means ofV a, bolt 12 to the bottom 63 of the pump body. A chamber 13formed above the pump body communicates with a delivery pipe 14 screwedinto the top of the chamber 13. In the chamber 13 are mounted deliveryvalves 15 having their seats in the plate 63. The lift of the deliveryvalves 15 is limited by stops 16 screwed into the top of the chamber 13.There are ten delivery valves. The chamber 13 is reinforced by ribs 11.In the pump body 6| are formed six pump compartments 18, 19, 80, 8|, 82,83 by means of end discs 80 and tubular liners 85. Each of thecompartments has at the top ports 86 and at the bottom ports 81, theports 81 communicating with the semi-annular chamber 66 and the ports 86communicating wth the semi-annular chamber 65. All these portsalternately act as suction and delivery ports. In the pump compartments18-83 work pistons 88 which are mounted upon a common piston rod 89 andare held at the required distance by tubular distance pieces 90. Thelowest piston 88 is held by a nut 9|. upon the rod 89 and the top pistonis held by a shoulder 92. The upper end of the piston rod 89 is guidedin a gland 93 of the end disc 61.

The reciprocating of the piston rod 89 may be obtained in any suitablemanner, for instance, by an eccentric drive. Upon reciprocation of thepiston'rod 89 the pistons move synchronously in their respectivecompartments. During the downward stroke liquid is drawn in through theports 86 and the valves 69 of the chamber 65 and simultaneously liquidis delivered through the ports 81 into the chamber 66 and through thedelivery Valves 15 communicating with this chamber. During the upwardstroke liquid is drawn in through the valves 69 into the chamber 66 andthrough the ports 81 and at the same time liquid is delivered above thepiston through the ports 86 into the chamber 65 and through the deliveryvalve 16 communicating with that chamber.

It will be seen that in this construction, too, all the parts can beeasily assembled and dismounted and that a very high capacity isobtained with a comparatively small size.

Figs. 11 and 12 show a construction embodying the features of theinvention of a twin pump, each of the units having four compartments andboth units being controlled by a comon multiple rotary valve.

is a tubular outer casing having a suction conduit |9| and a deliveryconduit |02. The casing is closed at the top by means of a cover |03bolted to the casing by means of screws |04, and is closed at the bottomby means of a base plate |05 xed to the casing by bolts |06. The tubularcasing |00 is divided by a transverse pump body |01 into two separatechambers |08 and' |09 of which the chamber |88 communicates with -thesuction v|0| and the chamber |09 communicates with the delivery |02. Thepump body |01 has two cylindrical bores ||0 and which are divided eachinto four compartments ||2 by means of end discs ||3. The end discs areheld at the required distance by cylindrical liners I4. Each compartmenthas two ports l5 and |6 and each of these ports alternately acts assuction and delivery port. discs. Each port is alternately brought intocommunication with the chamber |08 and |89 by means of a rotary valvemember I1 mounted in a central bore IIB of the pump body |01. Thecentral bore I8 communicates with the chambers |88 and |09 by means oflateral ports |9 and |20. The valve member ||1 has recesses |2| and |22adapted to establish communication between` the ports H5, ||6 and theports ||9, |20. Pistons |23 working in the pump compartments are mountedon two piston rods |24, |24 and are held at the required distance apartby cylindrical tubes |25, the lowest piston being held by nuts |26 andthe top pistons being held axially by cylindrical sleeves |21. The twopiston rods |24 are driven from a common shaft |28 which is mounted inball bearings |29, |29 carried by the cover |03. The piston rods aredriven by eccentrics |39, |30 mounted upon the shaft |28 at a phaseangle of 90. The common distributing valve I1 is driven from the shaftby bevel gears |3| and |32 at hali the speed of the shaft |23.

It will be seen that in this construction too, all the parts can beeasily assembled and dismounted and that the capacity of the pump isvery high considering the size of the pump.

Whilst it is, of course, possible to use'any suitable kind of pistons,some preferred piston constructions are indicated in the drawings.

I claim:

1. A pump having a plurality of tandem pumping units, comprising acylinder body having a cylindrical bore, there being a chamber on eachside of the cylinder body, a plurality of liners in the bore of thecylindrical body, a spacing disc between adjacent liners, a cylinderheat at each end of the bore, the liners, discs and heads formingcylinders, there being ports connecting the ends of the cylinders withthe chambers at the sides of the cylinder body, a. piston` rod, and apiston in each cylinder connected to the piston rod.

2. A pump having a plurality of tandem pumping units, comprising acylinder body having a cylindrical bore, there being a chamber on eachside of the cylinder body, a plurality of liners in the bore of thecylindrical body, a spacing disc between adjacent liners, a cylinderhead at each end of the bore, the liners, discs and heads formingcylinders, there being ports connecting the ends of the cylinders withthe chambers at the sides of the cylinder body, a piston rod, a pistonin each cylinder on the piston rod, a spacing sleeve on the rod betweenadjacent pistons, and means for clamping the pistons and spacing sleeveson the piston rod.

3. A pump having a plurality of tandem pumping units, comprising acylinder body having a cylindrical bore, there being a chamber on eachside of the cylinder body, an inlet valve for each chamber, an outletvalve for each chamber, a plurality of liners in the bore of thecylinder body, a spacing disc between adjacent liners, a

The ports extend through the endV cylinder head at each end of thebore,A the liners,

discs andheads forming cylinders, there beingl ports connecting the endsofthe cylinders with the chambers atthe sides 4of the cylinder body,

a piston rod, and a piston in each cylinder connected to they pistonrod. f

4. A pump having a plurality of tandem pumping units comprising a bodyhaving a cylindrical bore,` a shell-on the exterior of the body, therebeing a chamber on each side of the body between the. body and theshell, a plurality of liners in the bore of theV cylinder body, aspacing disc between adjacent liners a cylinder head at each end of thebore, the liners, discs and heads forming cylinders,A there being portsconnecting the endsy between adjacent liners, a cylinder head at eachend of the bore the liners, discs and heads forming cylinders, therebeing ports connecting the:

ends'of thecylinders with thecharnbers at.. the

sidesv of the cylinder body, a piston rod, a piston in each cylinder onthe piston roda spacing sleeve on the rod between adjacent pistons,resilient means between the pistons and* adjacentV spacing sleeves andmeans for clamping the pis-M tons and spacing sleeves on the pistonrod.. 'n

Y 6. A pump having a plurality of tandem pumping units, comprising abody having a cylindricaly bore centrally thereof, there beingarchamber;

in the body on each side of thebore, a plurality of liners' in the bore,a spacing disc between ad-V jacent liners, a cylinder'y head at eachend'. of the bore, the liners, discs and heads forming cylinders, therebeing ports connecting the ends ofk the cylinders with the. chambers atthe sides of the bore, al piston rod, a piston'` in each cylinder'connected to the piston rod, an inlet Valve for each chamber, and anoutlet valve for each chamber. Y

WILLIAM JOHN GEEL

